<?php
    header("content-type:text/html;charset=utf8");
    $cat = $_GET['cat'];
    if($cat == 'all'){
        $where = '';
    }else{
        $where = " where cat=$cat";
    }

    $sql = "select * from goods $where";
    $con = mysqli_connect("localhost","root","root","user");
    mysqli_query($con,"set names utf8");
    $res = mysqli_query($con,$sql);
    $arr = [];
    while($row = mysqli_fetch_assoc($res)){
        $arr[] = $row;
    }
    echo json_encode([
        "meta"=>[
            "status"=>0,
            "msg"=>"数据获取成功"
        ],
        "data"=>$arr
    ]);
?>